Mattison had three carries for 11 yards and one reception for 17 yards on his only target in Sunday's loss to Arizona.
Mattison played 13 snaps on offense, slightly up from nine snaps last week, but he had four touches compared to two last week. He'll have a minimal role as long as Dalvin Cook is healthy. However, Mattison's workload could increase Week 3 if the sprained ankle that Cook suffered Sunday limits his snaps.